Concentrator.



W. A. BUTGHART.

GONGENTEATOR.

APPLICATION FILED 110v. 29, 1913.

Patented Se t. 29, 1914.

2 SHEETS SEEET 1 W. A. BUI'CHART,

GONGENTBATOB. APPLICATION FILED NOV.29,1 913.

Patented Sept. 29, 1914.

2 SEEETSSHBET 2.

WILLIAM A. BUTCHABT. Of DEHVEE. COLORADO.

concsnranron.

Specification of Letters Patent.

Patented Sept. 29, 3.1.? 5-.

Application filfid November 22, 1913. Serial so. 893,641.

Be it known that I. \VILLLU; it. Bii'rcn- ART. a citizen of the United States. rcsid ing at Denver, in the count of Denver and State of iolorad have invented a new and useful Concentrator. of which the following is a specification.

This invention relates to comeulratms ot the reciprocating table type and more particularly to an improvement in the concentrator d'sclosed in the United States Patent No. 99'? 5, granted to me July *l-lll. 1911, in which rifiies are placed upon the table in such manner that its surface is divided by deflections of the ritlles into three distinct zones, whose respective functions are stratification, cleaning and discharge or finished product or concentrate.

The main object of the present invention is to increase the efiectiveness of concentration and cleaning and to increase the capacity of the concentrator of the above de scribed type. The greater efficiency is obtained by forming the rifilcs in such manner that in one or more of these zones they gradually.decrease in height from the upper toward the lower-side of the table. This graduation in the height of the ri lles may be distributed uniformly so that each ritlle is sligl'rtly lower than the rillle neat above it on the table, or the gradation may take place by steps, the rii'rles being arranged in a series of groups of progressively decreasing height.

Other objects of the invention will appear hereinafter.

The accompanying drawings illustrate an embodiment of my invention, and referring thereto: Figure 1 is a plan view of a con centra'tor embodying my invention. F :2 is a section on line w en in Fig. 1. Fig. 3 is. a section on line a2-afi in Fig. 1. Fig. 4 is an elevation of one of the rilhes. Fig. 5 is a transverse section of atablc showiu a modified concentrator. Fig. 6 is an elevation or one of the rillles: shown in Fig. Fig. 7 is a transverse section of. a modified form of table. Fig. 8 is a plan view oi another modification.

l designates a concentrator table supported on suitable means '2 for permitting reciprocating longitudinal mot-ion thereof by head motion 3 adapted to impart to the table a dill'ereniial reciprocation so as to produce a tendency for the material on the table to move from the feed end to the'delivery end receiving end is provided a feed box 5 I of the table. The table supported in uu'li ed position so that one edge I: is somewhat higher than the opposite edge 1/. and

may be also inclined somewhat lougiiudi nally so that the delivery end a is slightly higher than the receiving end a. An end board 1' is provided atthe receiving end for retaining the material on the table. At the upper or feed side the tahleand at the of any suitable construction adapted to recei e the material to be concentrated together i feed Water. and to distribute it over the re ceiving end of the table at the upper side thereof. A water box 6 for dressing water also provided at the upper side of the table. The surface of the table 1. is approximately aplane and is formed in any suitable manner for receiving the material. for example. of wood covered with linoleum. ()n the surface ofthis table are securml a se ries of rifiie 7. la the form of the invention shown in Figs. 1 to 2; rillle strips 7 are longitudinally tapered rontinuously from the feed receiving to the concentrates delivery end. The initial portions F" of the rillies preferably extend longitudinally of the table parallel to the line of reciprocation or approximately so. the area occupied by these rillie portions constituting a stratifying zone. Along a certain line co extending preferably diagonally of the table from near the feed box to a point adjacent to the lower corner at the concentrates dis- Wardly as shown at 9.

table occupied by these upwardly deflected sections 7 of the rifiies constitutes the cleaning;- zone. These upwardly deflected portions terminate along a line ff. also preferahl v extending diagonally across the table, the riilles being again deflected at this line, toward the concentrates discharge end, and

from this line of deflection f extending rcctilinearly approximately parallel to the line of reciprmation as shown at 7 the area occm iied by these rillle portions?" hemg the concentrate discharge Zone. Near the concentrates discharge end of the table the riil les are again deflected upwardly as shown at 7 for the purposes hereinafter set forth.

In Fig. 2 the riilles T are shown as oi progressively decreasing height from the upper to the lower side of the table. By reason of this graduation. in height and of the longitudinal taper of the rililes in conjunction with the diagonal arrangement of the cleaning zone, it follows that the rifilcs in secure full capacity in concentration and 1o eiliciencv in cleaning, that the width of the interriille channels be properly proportioned i to the height of the riilles. so that the cross sectional form of the interriflle channels. may

be approximately the same at all points upon the table. To accomplish this the thicker ritlles toward the upper side of the table are placed farther apart than the thinner rilllcs toward the lower side thereof, the distances between the riflles decreasing progressively from the upper to the lower side of the table.

The operation is as follows: Material to be concentrated is supplied to the feed box 5 and is distributed upon the table by the accompanying feed water. As the material passes over the table it is intercepted by the riilles 7, and the differential longitudinal reciprocation of the table causes the material to become stratified, with concentrates at the bottom of each interriille channel, and

at the same time to advance from the receiving toward the delivery end in well known manner. As the material thus advances it is subjected to the action of dressing water flowing across the table from the dressing water box 6. Tlpon reaching the deflected ritlle sections in the cleaning zone, the material is subjected to additional influences: 1st,--A rearward flowof dressing water along the inter-rillle channels. the direction of flow being-the reverse of that which the material is moving, and 9nd. A vanning action or sideshake caused by the riflles in the cleaning zone/not being parallel to the line of table reciprocation.

By these means the sand or gangue matter is brought to the surface. washed backward and out of the cleaning zone by the dressing water, passes successively over the ritlies and is discharged at the tailings side of the table.

The clean concentrates pass into the delivery zone between the ritlle portions 7 and are nguided thereby to the delivery end of the 'table where they are discharged into any suitable receptacle. As the rifile portions 7 are frequently of considerable thickness.

(6. g. 3/8 to 3%"), it is evident that water passing on to the table from the water box 6 will be entirely carried away by the upper 'rililes, the greater portion escaping over the concentrates discharge end. and that the lower rillles will thus be deprived of the necessary dressing water. The. upward deflections T at the delivery end of the table retain water in the iuterritlle' channels, ther by maintaining the mobilit} of the material therein, and causing an ample supplyof Water to flow across the table to the lower ritlles.

The removal of silica or gangue matter is effected largely in the cleaning zone above described, between the lines ce and ff, and it is in thiszone more particularly that the gradual decrease in height of the riilies from the upper to the lower side of the table is most essential, since it is in this zone that the concentrates tend to accumulate and height oi the rilllesin such Zone also de- 1 sirable in some cases. Inasmuch as the amount oi. concentrates delivered decreases in general from the upper to the lower side of the table, this gradation in the height of the riiiies is also of advantage in the delivery zone. The construction shown in Figs. 2 and 3 provides for such transverse gradation of height of the ritlles in the stratifying zone. in the cleaning zone and also in the delivery none, since each riille is of less height than the one next above it throughout its length. The, advantage of the graduation in width of the'interrifiie channels will be apparent on reference to Fig. 2 wherein the dotted lines drawn horizontally from the u wer ed 'es of the rifiies indicate the overflow level for each riflle. It is clear that to secure the mavimum carrying ca.- pacity of each interriille channel its width should be proportionate to the height of the rillic at the lower side thereof. and therefore the width of the channel should be determined by the height of the adjacent ritiles.

The height of the ritlles may he graduated progressively as above described, or in steps, as shown in Fig. 5, each stop consisting of a group of riillcs of equal height throughout the group. but of greater height than the rifilcs in the group next lower on the table,- and as shown in Fig. 6, the riftles may be untapered or of uniform height from end to end, the transverse decrease in depth of the interritlle channels in the. several zones being in that case produced solely by the transverse graduation in the height of the ritlles themselves. (in the other hand. as

z shown in Fig. 7, the ritlles may be all of uni form heightlrom side to side of the table,

. but tapering longitudinally. as in Fig. 4, so

. that by reason of the diagonal arrangement near the feed end and in progressively thinner or lower portions toward the discharge end oi the table, the longitudinal taper of the rrllles, in coniunction with the oblique arrangement of the cleaning Z0116, producing a. progressive decrease in the height of the riiiles in the cleaning zone.

liy arranging pri'igressively decreasing heights of rillles from the upper toward the lower side of table, as shown in Fig. 2 or Fig. 5, it is evidently possible to cause the cleaning Zone torross the table at right angles shown in Fl 8. instead of ding onally thereoi. While still retaining the desired features of successii'ely diminishing riilie thicknesses therein.

It should llB i-inderstood that the lines cc, ff, may occur at other locations than those iier shown, and that if both he moved rearwardly of the table surface and somewhat more n" 1 separated, the initial portions 7" in in Whole or in part sn pressed. the stratiiication and cleaning zones heing thus Whellv or partially merged. 0r the line i ma :re moved toward the concentrate tlisclrrsre cn h "o to eliminate cl aiin i ll hat s: i. i recigrccat' oncentraor table a transi (liner plz-uie snrface reed and r snppl'; nice-=s at the 1 "er side 1" ex and TVHIil i a rice; hing i icr pai-i. tl'ian of the table to provide tile portions in said height the the lower part of said rat r table havplane surface, 7 means at the v rifiles I ,ight

e concenconcent ccntrator table havpiano siiriai-e, rave forming 1 ar- (T i T: ceil and wash n'nid the tail w; c concentrator table having a tmnsverscly inclined plane surface panllel riflles on said surface consisting of strips decrea g in height from the higher or dressing Water side thereof tor rd the lower or railings discharge side 0; 11d surface, said rillicr separated by parallel channels progressively decrea ing in Width from the higher or teed and Wash water side of said surface tmi'ard the lower or tailings disi'iharge side thereof.

A reciprocating conccntrmor table having a transversely inclinez, plane surface, riiilesthcreon decreasing in height above said surface from the higher toward the lower side thereof. said rifiles being deflect ed first toward the higher or Wash Water side of said table and then toward the concentrates discharge end thereof, said deflections occurring the respective riiiies at points which will produce a continuous zone of deflected rifile portions extending from the higher toward the lower side of said table and the height of the rifiies in said zone progressively decreasing toward the lower part of the zone.

6. A reciprocating concentrator table having a transversely inclined plane surface,

riflles thereon tapering or "diminishing in height from the feed receiving end of said table to the concentrates discharge end thereof, said riilles being a? certain points deflected first toward the higher or Wash water side of said table and then toward the concentrates discharge end thereof, said deflections occurring at such points in the respective riiiles as will produce a zone of tapering deflected rifiie portions extending across said. table in a diagonal direction in such manner that said deflected tapering riille portions decrease in their respective heights from the higher toward the lower or tailings discharge side thereof.

' T. A reciprocating concentrator ifilllfillllling a transversely inclined plane surface, rillies thereon extending substantially the full length thereoh'the course of said riiiies l-eing deflected three times, the first and third of said deflections being toward the higher or feed and dressing water side of the table, the third separated from the second by straight riiilcs, the third deflection terminating at the concentrates discharge end of the table. v

8. A reciprocating concentrator table having a transversely inclined plane surface, provided with channels extending substantially from end to end thereot, the course of said grooves or channels being three times changed or deflected, the first deflection loeing toward the higher or dressing water 3 lo oi? said table, the second deflection l c in a ilirection the reverse of the first, i l the third deflection being in substantially the same direction as the first.

9. A reciprocating concentrator table having a transversely inclined plane surface, part than at the lower part of said table,

riflles on said surface consisting of strips (leer-easing in height from the higher or dressing water side thereof toward the lower or tailings discharge side of said surface, said rilfles separated by channels decreasing in Width from the higher toward the lower side thereof, said rifiies having portions thereof deflected toward the upper side of the table to constitute a cleaning zone, the riflle portions in said cleaning zone being of greater height at the upper and said riflies having upwardly deflected portions terminating at the concentrates dis- 15 charge end of the table.

In testimony whereof, I have hereunto set my hand at Morenci, Arizona, this 22nd day of November, 1913.

"WILLIAM A BUTCHART.

In presence of- DONALD A. S. BELL, HARRY L. HALL. 

